Simulation of network service test environments

To facilitate the testing of a testee network service such as a web service made available on the Internet, various embodiments of a network service test system are provided. In one embodiment, a testee network service is tested using a network service test environment. The network service test environment surrounds the testee network service. The network service test environment comprises at least one mock client that is in data communication with and interacts with the testee network service. The network service test environment also includes at least one mock support network service in data communication with the testee network service. The at least one mock support network service simulates a performance of an actual support network service while a data communication link exists between the actual support network service and the testee network service.